Question

In a wave, the path difference corresponding to a phase difference of $\phi$ is

• A. $\frac{\pi}{2 \lambda} \phi$
• B. $\frac{\pi}{2} \phi$
• C. $\frac{\lambda}{2 \pi} \phi$
• D. $\frac{\lambda}{\pi} \phi$

Answer 1

Answer: (C)

Phase difference of $2 \pi$ corresponds to path difference of $\lambda$. So, unit phase difference corresponds to $\frac{\lambda}{2 \pi}$. Clearly, the phase difference $\phi$ corresponds to a path difference of $\frac{\lambda}{2 \pi} \phi$